Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 182

[7-2 Error Code Definitions and Solutions: Codes [0 - 999] ]
(4) Incorrect DIPSW setting on the Fan board
Make sure the DIPSW on the Fan board are set as follows.
Models with a single fan
DIPSW 1-3: ON
(All other switches: OFF)
Models with two fans
DIPSW 1-3 on the right Fan board: ON (All other switches: OFF)
DIPSW 1-4 on the left Fan board: ON (All other switches: OFF)
[HBC]
(1) Faulty wiring
Check the following wiring connections.
1) Between the control board and the pump INV board (Detail code 5, 6)
Control board
CN4A
CN4B
CN302
-
-
2) Between the control board and the power-supply board (Detail code 8)
Control board
CN901
CN902
3) Between the control board and the valve block board (Detail code X1, X2, X4)
Control board
CNV1
CNV2
CN702
-
(2) Power-Supply board failure
Replace the power-supply board if any of the LEDs on the following is unlit: Inverter board, control board, power-supply board,
or valve block board.
(3) Inverter board fault, control board fault, and valve block board fault
If the problem persists after a power reset, replace the INV board, FAN board, control board, or valve block board.
(4) Incorrect DIPSW setting on the pump INV board
Make sure the DIPSW on the pump INV board are set as follows.
DIPSW 1-3 on the left pump INV board: ON (All other switches: OFF)
DIPSW 1-4 on the right pump INV board: ON (All other switches: OFF)
(5) Incorrect address setting for the valve block board
Check that CNADR of the valve block board is as follows.
6/8-branch model: No connector connection to CNADR
16-branch model: Connect the connector to the CNADR of the left valve block board.
BS_07_M
Inverter board Power-supply board
CN80
CN80
-
CN81
CN81
Power-supply board
CN001
CN002
Valve block board
CNVS1
CNVS1
CNDC1
CNDC1 ↔ CNDC2
-
-
CNRST
CN17V1
CN17V2
9
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